Road roller



N. REVERS ROAD ROLLER Sept. 30, 1952 3 Sheets-Sheet 1 Filed Dec. 19, 1946 INVENTOR. Aha/o4 4/25 A: V6195 ATTORNEY N. REVERS ROAD ROLLER Sept. 30, 1952 Filed Dec. 19, 1946 3 Sheets-Sheet 2 INVEJNTOR. MCHOLAAS REVERS Wfl Q,

ATTOR/VEX P 1952 N. .RE-VERS 2,612,090

ROAD ROLLER Filed Dec. 19, 1946 3 Sheets-Sheet 5 INVEN TOR. May/04 AAJ A:- 1/525 A T TO/P/VEX Patented Sept. 30, 1952 Application December 19, 1946, Serial No. 717,295

In the Netherlands N ovember i 1.945 1 Section 1, Public Law 690, Au usta, 1946' This invention relates to a road roller having two front rollers arranged one behind the other, and two driving rollers arranged side by side at the rear ofthe road rolling machine. The said front rollers are both turnable, so that each roller obtains a rolling movement.

In the rollers heretofore known, the rear roller of the front rollers is so arranged as not to be displaced in a horizontal direction, that ,is to say, in the longitudinal direction of the roa rolling machine. I

-. .Thepresent invention improves this kind of road rollers in the manner that therear roller of the front rollers is arranged displaceably in the longitudinal direction of the. roadrolling machine. a

By this improvement it is madepossible that undulations in the road surface maybe wholly removed.

Thus, by the fact that the rear roller. ofthe front rollersmay be placed in a different, or changed, position, undulations that may have been formed, after the rolling machine has worked the road surface once, may be completely removed, so that a flat road surface is obtained. q

To provide the displacement of the rear roller of the front. rollers in a way that assures a solid construction without diminishing the effect of the rolling movement of the front rollers, it is preferable that the foremost roller of the front rollers is steered by means of two bars driving a wheel fixed at the vertical shaft of said foremost roller, said bars being driven by means of a corresponding wheel, both of said wheels being connected by means of a strip that is turnably connected with two equi-positioned points, one at each wheel, while the connection of said strip with the foremost roller enables a longitudinal displacement of the strip, and moreover at such distance from the center of said foremost wheel that the distance is greater than the distance ofthe equi-positioned point of the other or rear wheelwith respect. to the center of said last mentioned wheel; said strip having a groove or slot guiding a pin connected to the vertical turning shaft of the rear rollerof the front rollers by means of an arm.

In the drawings:

Figure 1 shows schematically a side view of the frame of a road rolling machine according to the invention.

Figure 2 shows a plan view of same. Figure 3 shows also a plan view in which both steering front rollers are placed in a turned position while Patent expires November 30, 1965 '1 Claim. (01 94- 50) Figure;4 shows a,longitudinal sectionof the rolling machine. I,

Figure Sis a view in vertical section, taken on li ne 5 5, of Figure 1 looking in the direction of the arrows.

Referring to the drawings, the numerall designates ,a main frame having .parallelside bars, or members la and l b, and arigid connecting end bar lc. and 2 designates a secondary frame,

having parallel sidebars 2a and 2b, which-is located over end portion of the main frame, I

Under the opposite end of the mainframel a ground roller 3 is mounted to rotate onthe axle 3a, which is supported by the e-shaped bracket 3b, swivelled at [3 to the horizontal plate 3d. carried bythe parallel side bars la and lb of themain frame. Inwardly of the roller 3 a second ground roller 5 is mounted to rotate on the axle 5a, which issupported on the U-shaped bracket 57), swivelled to the horizontal plate 50,

.carried bythe sidebars la and lb of the main frame, as at 5d. Circular bearings 3m and 5m are interposed between bracket 3band plate 3d,

. and between bracket 51) and plate 50 respectively.

, A vertical shaft I3 is connected-with the bracket-3b, and on its upper end a wheel l3a is mounted. A shaft. [5 is supportedvertically onthe main frame,,endwise of the roller 5, and

carries a wheel l5a. A bar I4 is pivotally connected at l5b witha projection on the wheel [5a and is formed with a longitudinal slot l5c at the end adjacentto the roller 3, while a pin I5. carried eccentrically by the wheel l3a works in the end slot I50. Intermediate of the ends of the bar l4 a longitudinalslot i8 is formed,

which is engaged-by the pin 19, on the outer end of crank arm lBb which is in turn carried by pivotshaft 5d connected to bracket 5b.

The wheel 13 is connected to the wheelJSa by means of the parallel bars l2 and Ma, at. the

ends of the latter, and on opposite sides of the pivot axes of the. wheels l3a and l5a.

The wheel (5a is engaged by .adrlve chain or cable 9a, which also engages the sprocket or drive gear 9b, carried by the shaft 90, on which the hand wheel 9 is mounted. By operating the wheel 9 the rotary motion ofthe sprocket or drive gear 9b will betransferred by the chain 9a to. the wheel l5a. This will produce a longitudinal shifting motion on the parallel bars i2 and I M, and a longitudinal shifting motion on the intermediate bar 14, which will cause the wheel l3a to turn in the same direction that the wheel I5a is caused to turn. This will result in the turning of the bracket 3b and the roller 3 in a corresponding direction.

Normally the intermediate bar 14 occupies the position shown in Figure 2, with the rollers 3 and 5 disposed in parallel relation to each other and at right angles to the main frame. When the wheel 15a is turned either to the right or to the left; the intermediatebar M will be displaced laterally from its normal central position, and this will cause the bar M to swing the pin 19 in an arc concentric to the axis 5d of the bracket 5?) of the roller 5, and thereby turn .the,

roller 5 in the same direction of turning produced on the roller 3, which may-be-non-parallel to the latter. r

A horizontal shaft [6 is"mountedtto rotate on the main frame I, and is equipped on' its outer end with a hand wheel and inwardly thereof with a bevel gear Ilia, and; near the remaining end with a bevel gear I611. The bevel It will be seen, therefore, that my invention provides means for increasing or reducing the spacing between the rollers 3 and 5, and of rotating both rollers from right-angular pressure positions, and of raising and lowering the wheels -4 and larelative to thegmain frame,

gear l6a has driving engagement with'the bevel gear 20a of the longitudinal side shaft 20, which is formed with-a screwor worm thread 10b,

that extends through the nut-2|; This-nut is connected with theplate 5c; which'ismounted to slide under and against themainframe I.

The bevel gear iBb engages a bevel gear fllcon the companion shaft 20'; whichisalsoformed with ascrew or'worm thread, and which engages the nut -2la, also connected for turning to the plate 5am The threads -of the shaftslfl and '-20'-may be rightfland left, and when the -cross shaft i6 is rotated -by the manual turning of the hand wheel 1,-the'bracket 5b will be shifted 1 with its roller 5, longitudinallyof-the main frame. To-permit this the longitudinal slotl8 ofthe-bar *M-is-made of considerable length, so that; the

pin {9 can freely move-therein forthe length of travel of the bracket 5b on the-mainframe.

" By this arrangement the spacing'betweenthe a roller 3 and the roller 5 maybe-variedconsid- --erably, to-concentrate pressure or rolling; effort -on the-roadway,-or to distribute's'uch pressure or rolling effort as local conditions may require. The auxiliary or secondary frame-'2 is' pivoted -iat '8 and 8a to the'side bars l 'a -an'd-lb of --the mam-frame, and on its outer ends carries a cross shaft da on--which the-groundtraction wheels .4 and-4e are mounted. Normally this-auxiliary frame rests on the upper" sideof the mainframe.

Each sidebar of the auxiliaryframe is provided with a'pendant bar. 2c, the-lowenend f which carries the bearing 4'bgfor' the -axle, or shaft 402.

Each side bar of the auxiliary-frame is 'provided with anut-Ga, which is engaged by =the;screw shaft-6, and the lowerend of-thi's shaft is mount- -edto turn in abearing 1m; carried by-then ain frame. The lower endof theshaft Sis-equipped with a=bevelled gear 6b, which engagesthe-bevelled gear 11a on r the end of the-cross shaft IT. :One of the shaftsfi is'equipped'on'its upper .-'end with a hand wheel 6c; and the other-shaft- -6 is-made :short."=l 3y turning the-hand wheel 60 both screw shafts -6 will-be turned simultaneously and .the auxiliary :and' 'upperfr-ame 2 willbe =lifted, \soas 'to elevate-the-wheels' 4 and 4e, and thereby lower the level-of the-main frame I. w r

The main frame I I is provided on -on'e or both sides with a horizontalscale ill, and thebra'cket b of the .-roller 5 is provided with apointer or indicator iflm which'is movedrhorizohtally across the scale ID, :vvhenthe "roller-iislshifted longitudinally of'the-mainframe.

'In Figures 2, and 3 1 rshowri inzidotted lines, concentric with the vertical shafts 5d and I3,

g circular bearings for the brackets 51) and 3b.

7 The bracket 3b and the plate 302 form a carriage and swivel head respectively for the roller 3,

which turns on' the pivot shaft I3, which extends through the plate 3d from the bracket 31). The

'---br'acketi5b;and the plate 50 form a swivel head and carriage respectively for the roller 5, and

-the;-pivot;sha ft 5d extends from the bracket 5b 1 through; the plate 50.

This carriage is adapted to. slide on the main frame under control of the adjustment screw shafts and 20', and permits of independent swivel movement of the roller 5.

' road rollen comprising a main a frame, Ear-first bracket swivelled on a pivot shaft under .-.the

' forward portion of the main -frame and i being provided with a road roller mounted to: rotate therein, a second bracket,rearwardly of said first bracket, swivelled on-a vpivot-shaft which extends-through aseoondary framefslidablewon end, an eccentric pincarr-ied by the. othen-wheel engaging said end slot adj acent and :1 over-'zthe first bracket, the pivot shaft of asa-id second 'bracket 1 being provided with an eccentric iarm having-an outer-pinengaging an elongated intermediate slot in said bar, screw shafts mounted longitudinallyof :the main. frame,. across-shaft t having gear 'diivingw connection With'.bDthl screw shafts, a: nutcarried: on each :end of 5 the sliding secondary -frame and engaging-each :screwi shaft,

- whereby thelast named bracket: mayv bershifted longitudinally of the main frame; and vertically adjustable rear wheels on the-main*frame -spaced longitudinally of the rollers.

w NICOLAASvREVERSQ V YEREEERLENGESGITED The rfollowing preferences are of record 1 in the .file'of'this patent UNITED STATES. Parents H Number Name. ;D.at'e.

" &l;265,l33 :Brown .4. 1 :May 14, 11918 1,6i3'i';208 iWilSOll July-26,,1927 1,650,746 :Stubbs Nov..29,-1927 389,728 i-Flettner c .Nov.i29,5'1 932 22015;891 :Greiner. et al. :-Oct.;1, 11935 FOREIGN PATENTS" Number Country .Date 

